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Finding the Fourth Proportional to 420,793.60, 629,961.60 and 376,556.80

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Solution

The fourth proportional to 420,793.60, 629,961.60 and 376,556.80 is: 563,735.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,793.60 : 629,961.60 = 376,556.80 : x
  2. Step 2: Convert to fraction form
    420,793.60/629,961.60 = 376,556.80/x
  3. Step 3: Cross multiply
    420,793.60x = 629,961.60 × 376,556.80
  4. Step 4: Simplify right side
    420,793.60x = 237,216,324,218.88
  5. Step 5: Solve for x
    x = 237,216,324,218.88/420,793.60
  6. Step 6: Final answer
    x = 563,735.58

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.